The label on a candy bar says 400 Calories.  Assuming a typical efficiency for energy use by the body, if a 57 kg person were to use the energy in this candy bar to climb stairs, how high could she go?

Q: )How long in minutes will the energy in a 904 k) (216 kcal) cup of yogurt last in a woman doing work…

A: Given: The energy is 904 kJ.             The power is 125 W.             The efficiency is 20.0%.…

Q: In doing 15000 J of work, an engine rejects 9000 J of heat. What is the efficiency of the engine

A: The efficiency of the engine is, e=ww+Q

Q: A fire is lit in a hot air balloon, causing 100 J of heat to flow into the air in the balloon.…

A: The change in internal energy is given by, ∆U=Q-W

Q: A heat engine receives 500 j of heat from its combustion process and loses 391 J through the exhaust…

A: Given data:  Heat input (Qin) = 500 J Heat loss = 391 J Required: The efficiency of heat engine

Q: While riding his bicycle, Jans does 7.5 E7 J of work and gives off 4.3 E7 J of heat. What is the…

A: Given Data:Work done Heat released To Determine:The change in the internal energy of the person.

Q: heat engine exhausts 8,200 J heat while performing 3,200 J of work. What is the efficiency of this…

A: Efficiency of heat engine is ratio of work done to the heat input .

Q: A steam engine operates at an overall efficiency of 15%. How much heat be supplied per hour in order…

A: Heat supplied per hour P=WtP=ηQtQt=Pη

Q: What is the work done by a 16-watt electric fan in 30 minutes? O 28 kJ 31 kJ O 17 kJ 18 kJ

A:

Q: Second Law of thermodynamics. An engine in performing 196 J of work discharges 34 J of heat. What is…

A:

Q: An electrical power station uses 1.58 x 1014 J of heat Input with an efficiency of 35.7%. (a) How…

A:

Q: A heat engine uses two containers held at different temperatures. One container is at 294 K, while…

A:

Q: gasoline engine is running, an amount of gasoline containing 11,700 J of chemical potential energy…

A: Efficiency =W/Q

Q: As a gasoline engine is running, an amount of gasoline containing 16,000 J of chemical potential…

A: The work done by the engine, W=4000 J   The input chemical energy, Einput=16000 J

Q: A heat pump is a heating system that has an efficiency of about 150 %, that is, for every joule (J)…

A: Let us first look at the statement of Second Law of Thermodynamics, the Kelvin-Planck Statement:…

Q: A student evaluates a weight loss program by calculating the number of times she would need to climb…

A:

Q: Give an explanation of how food energy (calories) can be viewed as molecular potential energy…

A: Given: Food energy can be viewed as molecular potential energy is discussed below.

Q: An engine doing work isothermally takes in 10kJ and exahusts 1kJ. What is the efficiency of the…

A: Heat takes the engine,                               Heat exhausts the engine,…

Q: According to their website, a single Wawa Italian Hoagie contains 450 food calories. Refer to…

A: It is given that,

Q: A weightlifter curls a 28 kg bar, raising it each time a distance of 0.55 m.  How many times must…

A:

Q: A sealed container containing water with stirring wings inside is heating up on the stove. In this…

A:

Q: An engine, operating with an efficiency of 0.225,  delivers 8.10 ✕ 105 J each minute. What is the…

A:

Q: Question 19 A gasoline engine with an efficiency of 0.397 generates 1.99 hp of power. If a liter of…

A:

Q: A heat engine exhausts 3 200 J of waste heat while performing 1 500 J of useful net work. What is…

A: Given data: Work done W=1500J Heat exhausted QC=3200J

Q: If the calories needed to ascend a 7-storey building are 60 Kcal, and your body efficiency is 17%,…

A: Write the given values with the suitable variables. Q=60 kcalη=17%=0.17 Here, Q is the food energy…

Q: A 1600 kg car steadily accelerates from rest to 60 mi/hr over a 2.8 second time span. How much work…

A: Given:mass of car, m = 1600 kgfinal velocity, vf = 60 mi/hr = 26.816 m/s

Q: A steam engine delivers 5.4×108 J of work per minute and services 3.6×109J of heat per minute from…

A: Given :W= 5.4 x 108JH= 3.6 x 109J

Q: Suppose you spend 30.0 minutes on a stair-climbing machine, climbing at a rate of 85 steps per…

A: Given that,Total time spent, (T)= 30 mins =1800 secMass of Person (M) =150 lb=68.038 kgHeight of…

Q: As a gasoline engine is running, an amount of gasoline containing 11,100 J of chemical potential…

A: Given Data: The input energy is: Qi=11100 J The output energy is: Qo=3700 J

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 495 kW-h/y.…

A: Given : Coefficient of Performance, COP = 6.3  Power, P = 495 Kw-h/y  Specific heat of water,…

Q: Why are energy equations important in Thermodynamics? Give 5 reasons.

A: Energy equations are fundamental in thermodynamics and play a crucial role in understanding and…

Q: he metabolic power for typing is 150 W for Lili, not a lot as you know probably. How long does it…

A:

Q: If I add 37,483 J of energy to an ideal gas inside a balloon, causing the internal energy to…

A: Given data The heat added inside the balloon is given as ∆Q=37483 J. The increase in internal…

Q: A PHYS 1510 student was working on a robotics project. The joints on the machine they were building…

A:

Q: A freezer has a coefficient of performance of 6.30. The freezer is advertised as using 525 kW-h/y.…

A: given coefficient of performance of 6.30 It is advertised as using 525 kWh/yr

Q: During running, you lost 4.0×104 J of heat, and your internal energy also decreased by 1.6×105 J.…

A: Change in Internal energy, ∆U=-1.6×105J Heat lost, Q=-4.0×104J

Q: When a certain type of coal is burned at a power plant, 22.6 ×106×106 joules per kilogram are…

A:

Q: Images observed using the light microscope are inverted and reversed. What does this mean?

A: Two convex lenses are required to produce the image in the light microscope. They are objective and…

Q: At a power plant that produces 1 GW (109 watts) of electricity, the steam turbines take in steam at…

A: Given: The temperature of steam is 500 degrees Celcius. The temperature of waste expelled is 20…

Q: 3.5x10^7 J of heat transfers into an engine. If 2.1x10^7 J of work is performed what is the…

A:

Q: Suppose you spend 30.0 minutes on a stairclimbing machine, climbing at a rate of 90.0 steps per…

A: The efficiency of the machine is

Q: A heat engine operates between a high temperature of about 600°C and a low temperature of about…

A: Given: The temperature of hot reservoir is 600°C. The temperature of cold reservoir is 300°C.